fix(web): improve responsive desktop UI

Keep narrow Changes views readable and prevent the prompt rail from entering chat content.

Replace the sidebar robot with the aligned Pythinker Code banner and rebuild the desktop web bundle.

Author: elkaix

.changeset/fix-responsive-changes-editor.md

@@ -0,0 +1,5 @@
+---
+"@pymodel/pythinker-code": patch
+---
+
+Wrap narrow Changes editor lines while keeping line numbers visible.

.changeset/update-sidebar-brand.md

@@ -0,0 +1,5 @@
+---
+"@pymodel/pythinker-code": patch
+---
+
+Replace the sidebar robot icon with the Pythinker Code banner.

apps/pythinker-code/dist-web/.web-bundle-manifest.json

@@ -1,4 +1,4 @@
 {
-  "sourceHash": "f543ac87a432db7c0b215013c9eac288288452e363003ad0fe874bc517dcf5f2",
-  "sourceFileCount": 399
+  "sourceHash": "83fb43adfcc43153083febd4bdb180eaea469369a828fd0068cf2af2be166bf2",
+  "sourceFileCount": 400
 }